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Sustainability with Affordability
Through Glass
What we have been doing…
Extinct Animal & Plant species
Deforestation
Loss of glaciers
Technology in every sector Investments
Dissatisfaction
Sustainability
What is Sustainability..?
Sustainability
Social
EnvironmentalEconomical
Collaborative Approach
Drivers of Sustainability
• Buyer
• End UserSocial
• Energy savings
• Natural lightEnvironment
• Capex
• OpexEconomy
Sustainable Development
Development focus started with
Thermal comfort
Health of well
being
Water efficiency
Indoor air quality
Energy efficiency
Commercial & Office Buildings
Residential Buildings
Form follows Function
Source: Council of Tall Buildings and Urban Habitat
Development progression
SMART Homes
SMART
Workspace
SMART
City
Stakeholders involved
New construction
Owner
Architect
PMC
End User
Consultants
Contractors
MEP
Vendors
Key Stakeholders
New Building
Buyer/
Owner
ArchitectEnd User
Do they really want to use the glass..??
Choice Vs Option
What will you choose.?
Happiness Index- Step 1
Buyer Architect End User
Issues Related to Conventional Green buildings
Sustainable:
E.P.I = 140 kWh/m²-yr
And affordable:
E.P.I = 140 kWh/m²-yr
• The mind set of people focuses towards gaining a status symbol rather than gaining economical and environmental benefits.
• Additional cost of Construction and Installation.• Additional cost for maintenance.
Innovative Products
Innovative techniques
Innovative technologies
Strategic & Tactics
Changing Façade Trends
Commercial Residential Institutional Amenities
30%
75%
25%
40%
30%
70%
35%
60%
With changing Architectural trends the WWR is continuously increasing .And this is why glazed facades become a major source of solar heat gain.
Needless to say…
Glass can not be looked in isolation
Glass Selection
Building orientation &
Form
Envelope component
design
Glass specifications
Climate & Micro-Climate
North, South, East & West
Circular, Rectangular, Square
Surface-to-volume ratio
Shading devices,
Fenestration size,
Placement of windows
SHGC & SC
U-Value
VLT
Temperature &
humidity,
Solar radiation,
Wind speed/direction
Landform, vegetation,
water bodies,
Open spaces, etc.
3610 Approach- Selection Approach
Glass Selection
Energy
Light
WindLife & Safety
Acoustics
Structural stability
Daylight & Glare
Connectivity to the environment
Reduced heat load
Sound Insulation
Preventing life hazards
Relation: Glass and Cost
High cost
Low U-Value
Low SHGC
(Efficient Glass)
Glazing Cost and
Performance
High performance glasses areinnovative products which areexpensive but cost beneficial as theamount of heat gain is less and hencemore energy saving.
SMART solutions
Double skin facade – Combination of perforated aluminum sheet & glazing
A school in Mumbai
The non-solar heat gets trapped between the perforated aluminium façade and inside skin when using a low-E glass.
Non-solar heat gain is the reason for increase in heat gains.
Type
Total Electricity Consumption
Electricity Cost Savings
( Mwh)Annual
(in lakhs) Annual
(in thousands)
Non - ventilated cavity
Base case - 12mm AIS Clear 871 52
12mm Solar Control 884 53 -78.88
12 mm Solar Control 876 52 -27.80
Solar Control 876 52 -27.80
Solar Control low e 876 52 -27.80
Ventilated cavity
12mm Solar control 718 43 921.07
Solar Control 718 43 921.07
Solar control low e 718 43 921.07
Innovative Techniques
Technology and Techniques go hand in hand.Developing new products and technologies alone cannot solve all the issues, their installation techniques andapplications are equally important.
Case 1Double Skin Façade
School, Mumbai
January
May
Glazing on East & South Façade showedthat Clear Glass performed as good asthe so called “high – performanceglasses” and the choice came down toaesthetics
Case 2:Optimum Orientation
Commercial, Navi Mumbai
Calculations Total(KWh)
Cost of Electricity
Savings (Kwh)/Yr
Savings(Rs.) / Yr
Cost of Glass
Cooling design(Kwh)
Cooling LoadIn TR
Units Cost(Cr.)
SavingExtra Paid for Glass
base caseclear Glass SGU
7032860 4.21 2750000 3052 862 300tr*3 2.13
Enhance Pine SGU 7244067 4.34 -211206 -1267237 5500000 2960 836 300tr*3 2.13 0.00 2750000
Enhance Reef SGU 7034942 4.22 -2082 -12491 5500000 2905 820 300tr*3 2.13 0.00 2750000
Proposed Glass 7099559 4.05 -66699 -400191 5750000 2800 790 300tr*2+ 200tr*1 1.90 0.23 3000000
Proposed Glass with lighting controls
7320208 4.39 -287347 -1724085 5750000 2876 812 300tr*2+ 200tr*1 2.01 0.118 3000000
Proposed Glass without lighting controls
7640898 4.58 -608038 -3648227 4250000 2885 814 300tr*2+ 200tr*1 2.01 0.118 1500000
Climatic condition of the location is important to select type of glazing as different weather conditions have different impact on glass.
Glass with SF of 37 & U-Val – 5.7 was as efficient as a glass with SF of 25 & U-Val – 3.7. The building design & the local weather conditions meant that you can relax the glass values and still be energy efficient.
Case 4 :Climate Analysis
Office , Bangalore
Case 5: Optimum Design
Learning center , Mumbai
Buffer created by placingservices on the East facade
Buffer created by corridors on the West facade
North Light
DESIGN FEATURES :
• Learning centre is optimally designed with louvers on all the glazed facades.
• North light on the roof for capturing daylight.
• The East and West radiations are blocked by creating buffer spaces of service areas and corridors
class rooms on the Northern side.
South Façade remains shaded
Environmental Debate
Grave to Cradle
Glass
AIS Presence
Faridabad
Mumbai
uPVC Doors &
Windows
Architectural Glass
Plant
(Float & Processed)
Chennai
Architectural Glass
Plant (Processed)
Roorkee
Architectural Glass
Plant
(Float & Processed)
AIS Processing Units covering most of the Geography..
New Technology- AIS Renew
Façade Retrofitting for better energy performance:
Installation takes only 30 to 60 minutes per window.
The existing glass continues to be used, and so does not require disposal.
Happiness Index- Step 2
Buyer Architect End User
Economical aspect
• Selection of glass as per project requirementCapex
• Savings in monthly energy bills (lighting, HVAC etc.)
Opex
Ways to look at COST factor
COST BenefitsROI
Happiness Index- Step 3
Buyer Architect End User
Way forward
Reference standards for lighting levels, HVAC, thermal
comfort conditions, natural ventilation and any other
building materials and system design criteria
Reference standards for mandatory requirement and
prescriptive requirements of building envelope, HVAC,
lighting levels, Service hot water in building rating system.
See More….
Choose Wisely
&
www.aisglass.com
Thank You
S Senthil Kumar
M: +91-9987194516